Coolkiller PolarBear vs Yunzii C21
Get the Coolkiller PolarBear for sound dampening. Get the Yunzii C21 for the 2,500 mAh battery.
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Which one should you get?
Get the
Coolkiller PolarBear
Sound dampening
Build quality in the bottom 45% of Numpad boards under $100.
Get the
Yunzii C21
Battery
Build quality in the bottom 50% of Numpad boards under $100.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
Coolkiller PolarBear
Yunzii C21
Connection
Wired, Wireless
Bluetooth, 2.4 GHz, Wired
Wireless for several devices and wired for lower latency
Battery
1,500 mAh
2,500 mAh
A larger battery means fewer cables during the day
Display
None
TFT
A case display rather than a typing feature
Weight
296 g
250 g
Heavier boards stay planted and lighter ones travel
Sound dampening
Yes
No
- Coolkiller PolarBear
- Yunzii C21
- Performance
- 5969
- Build quality
- 6162
- Productivity
- 7258
- Customizability
- 5566
- Portability
- 8788
- Layout size: Numpad
- Hot-swappable
- Switch options: Linear
- Mount style: Gasket Mount
- Keycaps: PBT
Coolkiller PolarBear vs Yunzii C21 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
8 of 20 specs differ
Coolkiller PolarBear
Yunzii C21
Switch options
Hot-swappable
Mount style
Sound dampening
Layout size
Layout standard
Ergonomics
Display
Connection
Max polling rate
Battery
USB-C
Case material
Keycaps
Weight
Dimensions
Backlight
N-key rollover
Mac & Windows
Released
Compare prices
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